2105456493 has 32 divisors (see below), whose sum is σ = 3245741056. Its totient is φ = 1189168128.

The previous prime is 2105456411. The next prime is 2105456503. The reversal of 2105456493 is 3946545012.

It is not a de Polignac number, because 2105456493 - 2⁹ = 2105455981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105456293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 659046 + ... + 662232.

It is an arithmetic number, because the mean of its divisors is an integer number (101429408).

Almost surely, 2^2105456493 is an apocalyptic number.

It is an amenable number.

2105456493 is a deficient number, since it is larger than the sum of its proper divisors (1140284563).

2105456493 is a wasteful number, since it uses less digits than its factorization.

2105456493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553.

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 2105456493 is about 45885.2535462102. The cubic root of 2105456493 is about 1281.6873281703.

The spelling of 2105456493 in words is "two billion, one hundred five million, four hundred fifty-six thousand, four hundred ninety-three".